I have realised if I carry or pack an umbrella on my trip to work, it
invariably doesn’t rain. But when I don’t have an umbrella it often
does rain. Sod’s law, as they say.
functioning umbrellas, maybe the size of a keyring. It would pack
easily into a bag or pocket and not be any bother to carry around but
it would keep the rain away. Not in the usual sense of course – it
would be useless if you were carrying it and it actually started
raining, but hey.